lets_plot.bistro.corr.corr_plot

class lets_plot.bistro.corr.corr_plot(data, show_legend=True, flip=True, threshold=None)

This class is intended to build correlation matrix plot.

Examples

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import numpy as np
from lets_plot import *
from lets_plot.bistro.corr import *
LetsPlot.setup_html()
np.random.seed(42)
data = {var: np.random.poisson(size=10) for var in 'abcdef'}
corr_plot(data).tiles().build()


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import numpy as np
from lets_plot import *
from lets_plot.bistro.corr import *
LetsPlot.setup_html()
np.random.seed(42)
data = {var: np.random.uniform(size=10) for var in 'abcd'}
corr_plot(data).tiles(type='upper', diag=True)\
    .labels(type='upper', diag=True, map_size=True, color='black')\
    .palette_RdBu().build()


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import numpy as np
from lets_plot import *
from lets_plot.bistro.corr import *
LetsPlot.setup_html()
np.random.seed(42)
data = {var: np.random.normal(size=10) for var in 'abcdef'}
corr_plot(data, flip=False, threshold=.4).points().labels()\
    .palette_gradient(low='#d73027', mid='#ffffbf', high='#1a9850')\
    .build()
__init__(data, show_legend=True, flip=True, threshold=None)
Parameters

  • data (dict or DataFrame) – Correlation will be calculated for each variable pair.

  • show_legend (bool, default=True) – If True legend is shown.

  • flip (bool, default=True) – If True the y axis is flipped.

  • threshold (float, default=0.0) – Minimal correlation abs value to be included in result. Must be in interval [0.0, 1.0].

points(type=None, diag=None)

Method defines correlation matrix layer drawn by points to the plot.

Parameters

  • type ({‘upper’, ‘lower’, ‘full’}) – Type of matrix. Default - contextual.

  • diag (bool) – Determines whether to fill the main diagonal with values or not. Default - contextual.

Returns

Correlation plot specification.

Return type

corr_plot

labels(type=None, diag=None, map_size=None, color=None)

Method defines correlation matrix layer drawn with geom_text to the plot.

Parameters

  • type ({‘upper’, ‘lower’, ‘full’}) – Type of matrix. Default - contextual.

  • diag (bool) – Determines whether to fill the main diagonal with values or not. Default - contextual.

  • map_size (bool) – If True, then absolute value of correlation is mapped to text size. If False - the text size is constant. Default - contextual.

  • color (str) – Set text color. Default - contextual.

Returns

Correlation plot specification.

Return type

corr_plot

tiles(type=None, diag=None)

Method defines correlation matrix layer drawn as square tiles to the plot.

Parameters

  • type ({‘upper’, ‘lower’, ‘full’}) – Type of matrix. Default - contextual.

  • diag (bool) – Determines whether to fill the main diagonal with values or not. Default - contextual.

Returns

Correlation plot specification.

Return type

corr_plot

build() → lets_plot.plot.core.PlotSpec

This method creates PlotSpec object.

Returns

Plot specification.

Return type

PlotSpec

palette_gradient(low, mid, high)

Set scale_color_gradient2() and scale_fill_gradient() for corr plot.

Parameters

  • low (str) – Color for low end of gradient (correlation -1).

  • mid (str) – Color for mid point (correlation 0).

  • high (str) – Color for high end of gradient (correlation 1).

Returns

Correlation plot specification.

Return type

corr_plot

palette_BrBG()

Set scale_color_brewer() with BrBG palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_PiYG()

Set scale_color_brewer() with PiYG palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_PRGn()

Set scale_color_brewer() with PRGn palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_PuOr()

Set scale_color_brewer() with PuOr palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_RdBu()

Set scale_color_brewer() with RdBu palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_RdGy()

Set scale_color_brewer() with RdGy palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_RdYlBu()

Set scale_color_brewer() with RdYlBu palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_RdYlGn()

Set scale_color_brewer() with RdYlGn palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot

palette_Spectral()

Set scale_color_brewer() with Spectral palette for corr plot.

Returns

Correlation plot specification.

Return type

corr_plot